Allosaurus vs Iguanodon
A detailed side-by-side comparison of Allosaurus and Iguanodon, covering size, diet, classification, geologic period, and discovery history.
Side-by-Side Comparison
| Property | Allosaurus | Iguanodon |
|---|---|---|
| Scientific Name | Allosaurus fragilis | Iguanodon bernissartensis |
| Classification | Theropoda | Ornithischia |
| Period | Jurassic Late | Cretaceous Early |
| Diet | Carnivore | Herbivore |
| Length | 9.7 m | 10.0 m |
| Height | 3.5 m | 3.0 m |
| Weight | 2.3 t | 3.4 t |
| Discovery Year | 1877 | 1825 |
| Discovery Location | Garden Park, Colorado, USA | Sussex, England |
| Named By | Othniel Charles Marsh | Gideon Mantell |
Size Comparison
roughly the length of a large SUV
about as long as 2 cars end-to-end
Weight Comparison
comparable to 2.3 small cars
comparable to 3.4 small cars
Timeline Comparison
Diet Comparison
Allosaurus
CarnivoreAllosaurus was a meat-eating predator, hunting other animals for food.
Iguanodon
HerbivoreIguanodon was a plant-eater, feeding on vegetation like ferns, conifers, and cycads.
Classification Comparison
Allosaurus
Iguanodon
Group: Ornithischia
(Bird-hipped dinosaurs)
Did You Know?
Allosaurus was a carnivore while Iguanodon was a herbivore.
Allosaurus lived during the Jurassic Late while Iguanodon lived during the Cretaceous Early, separated by roughly 0 million years.
Iguanodon was discovered 52 years earlier, in 1825.
Allosaurus belonged to Theropoda while Iguanodon belonged to Ornithischia.
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